Noise Reduction Rating - 33 Decibels The Highest Independently Tested NRR Tapered for an easy, snug, comfortable seal Foam Ear Plugs EPA PROTECHS™ Ear Plugs for SPORT have the highest independently tested noise reduction rating to help block extreme noises like stadium noise and gun shots. Noise Reduction Rating: 33 Decibels (when used as directed). The range of noise reduction ratings for existing Hearing protectors is approximately 0 to 30 (higher numbers denote greater effectiveness) Information Required by EPA: The level of noise entering a person's ear, when a hearing protector is worn as directed, is closely approximated by the difference between the A-weighted environmental noise level and the NRR. Example: The environmental noise level as measured at the ear is 92 dBA.
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